The US has launched retaliatory strikes in Iraq and Syria against Iranian-backed militants after three US soldiers were killed in Jordan last week.

Dozens of others were also injured in the attack on the Tower 22 base near the Syrian border.

It marked the first time US troops have been killed by enemy fire in the Middle East since the beginning of the Gaza war.

Biden had warned that the US would respond to the aggression with force.

The strikes have targeted locations across the Middle East and are expected to last for days.

Earlier this week, the US Department of Defence named the three soldiers who lost their lives in the attack.

Sgt William Jerome Rivers, 46, of Carrollton, Georgia, Spc Kennedy Ladon Sanders, 24, of Waycross, Georgia and Spc Breonna Alexsondria Moffett, 23, of Savannah, Georgia all died on Sunday's strike.

The three were all supporting Operation Inherent Resolve and had been assigned to the 718th Engineer Company, 926th Engineer Battalion, 926th Engineer Brigade, Fort Moore, Georgia.